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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package helpers | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "code.cloudfoundry.org/lager/v3" | ||
| "golang.org/x/crypto/bcrypt" | ||
| ) | ||
|
|
||
| type BasicAuthenticationMiddleware struct { | ||
| usernameHash []byte | ||
| passwordHash []byte | ||
| } | ||
|
|
||
| // middleware basic authentication middleware functionality for healthcheck | ||
| func (bam *BasicAuthenticationMiddleware) BasicAuthenticationMiddleware(next http.Handler) http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| username, password, authOK := r.BasicAuth() | ||
|
|
||
| if !authOK || bcrypt.CompareHashAndPassword(bam.usernameHash, []byte(username)) != nil || bcrypt.CompareHashAndPassword(bam.passwordHash, []byte(password)) != nil { | ||
| http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized) | ||
| return | ||
| } | ||
| next.ServeHTTP(w, r) | ||
| }) | ||
| } | ||
|
|
||
| func CreateBasicAuthMiddleware(logger lager.Logger, usernameHash string, username string, passwordHash string, password string) (*BasicAuthenticationMiddleware, error) { | ||
| usernameHashByte, err := getUserHashBytes(logger, usernameHash, username) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| passwordHashByte, err := getPasswordHashBytes(logger, passwordHash, password) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| basicAuthentication := &BasicAuthenticationMiddleware{ | ||
| usernameHash: usernameHashByte, | ||
| passwordHash: passwordHashByte, | ||
| } | ||
| return basicAuthentication, nil | ||
| } | ||
|
|
||
| func getUserHashBytes(logger lager.Logger, usernameHash string, username string) ([]byte, error) { | ||
| var usernameHashByte []byte | ||
| var err error | ||
| if usernameHash == "" { | ||
| if len(username) > 72 { | ||
| logger.Error("warning-configured-username-too-long-using-only-first-72-characters", bcrypt.ErrPasswordTooLong, lager.Data{"username-length": len(username)}) | ||
| username = username[:72] | ||
| } | ||
| // when username and password are set for health check | ||
| usernameHashByte, err = bcrypt.GenerateFromPassword([]byte(username), bcrypt.MinCost) // use MinCost as the config already provided it as cleartext | ||
| if err != nil { | ||
| logger.Error("failed-new-server-username", err) | ||
| return nil, err | ||
| } | ||
| } else { | ||
| usernameHashByte = []byte(usernameHash) | ||
| } | ||
| return usernameHashByte, err | ||
| } | ||
|
|
||
| func getPasswordHashBytes(logger lager.Logger, passwordHash string, password string) ([]byte, error) { | ||
| var passwordHashByte []byte | ||
| var err error | ||
| if passwordHash == "" { | ||
| if len(password) > 72 { | ||
| logger.Error("warning-configured-password-too-long-using-only-first-72-characters", bcrypt.ErrPasswordTooLong, lager.Data{"password-length": len(password)}) | ||
| password = password[:72] | ||
| } | ||
| passwordHashByte, err = bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost) // use MinCost as the config already provided it as cleartext | ||
| if err != nil { | ||
| logger.Error("failed-new-server-password", err) | ||
| return nil, err | ||
| } | ||
| } else { | ||
| passwordHashByte = []byte(passwordHash) | ||
| } | ||
| return passwordHashByte, nil | ||
| } |